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Date:      Wed, 8 Apr 2015 21:55:18 +0200
From:      Mateusz Guzik <mjguzik@gmail.com>
To:        Chagin Dmitry <dchagin@freebsd.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org
Subject:   Re: svn commit: r281113 - head/sys/vm
Message-ID:  <20150408195518.GA6086@dft-labs.eu>
In-Reply-To: <20150405185419.GA46092@dchagin.static.corbina.net>
References:  <201504051825.t35IPO7t078390@svn.freebsd.org> <20150405183947.GA24293@dft-labs.eu> <20150405185419.GA46092@dchagin.static.corbina.net>

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On Sun, Apr 05, 2015 at 09:54:19PM +0300, Chagin Dmitry wrote:
> On Sun, Apr 05, 2015 at 08:39:47PM +0200, Mateusz Guzik wrote:
> > On Sun, Apr 05, 2015 at 06:25:24PM +0000, Dmitry Chagin wrote:
> > > Author: dchagin
> > > Date: Sun Apr  5 18:25:23 2015
> > > New Revision: 281113
> > > URL: https://svnweb.freebsd.org/changeset/base/281113
> > > 
> > > Log:
> > >   Fix wrong kassert msg in uma.
> > >   
> > >   PR:		199172
> > >   Submitted by:	luke.tw gmail com
> > >   MFC after:	1 week
> > > 
> > > Modified:
> > >   head/sys/vm/uma_core.c
> > > 
> > > Modified: head/sys/vm/uma_core.c
> > > ==============================================================================
> > > --- head/sys/vm/uma_core.c	Sun Apr  5 17:09:58 2015	(r281112)
> > > +++ head/sys/vm/uma_core.c	Sun Apr  5 18:25:23 2015	(r281113)
> > > @@ -3060,7 +3060,7 @@ uma_zone_set_fini(uma_zone_t zone, uma_f
> > >  	uma_keg_t keg;
> > >  
> > >  	keg = zone_first_keg(zone);
> > > -	KASSERT(keg != NULL, ("uma_zone_set_init: Invalid zone type"));
> > > +	KASSERT(keg != NULL, ("uma_zone_set_fini: Invalid zone type"));
> > >  	KEG_LOCK(keg);
> > >  	KASSERT(keg->uk_pages == 0,
> > >  	    ("uma_zone_set_fini on non-empty keg"));
> > > @@ -3100,7 +3100,7 @@ uma_zone_set_freef(uma_zone_t zone, uma_
> > >  	uma_keg_t keg;
> > >  
> > >  	keg = zone_first_keg(zone);
> > > -	KASSERT(keg != NULL, ("uma_zone_set_init: Invalid zone type"));
> > > +	KASSERT(keg != NULL, ("uma_zone_set_freef: Invalid zone type"));
> > >  	KEG_LOCK(keg);
> > >  	keg->uk_freef = freef;
> > >  	KEG_UNLOCK(keg);
> > > 
> > 
> > This seems to be a recurring problem (go figure).
> > 
> > Was __func__ usage flamed over?
> > 
> > I really think that linux's oops-like dump would be of great help here.
> > It includes file + line info along with register dump which alone can
> > give sufficient hints in several cases.
> > 
> finally, kassert prints backtrace. also feel free to set
> debug.kassert.do_kdb. 

The point is to have initial user reports more useful. As it is, with
mere panic message there is not much to work with.

-- 
Mateusz Guzik <mjguzik gmail.com>



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